Hi. The deployment package is not likely relevant for your use case. That is specifically for ensuring that deployment associates deployed metadata with a package for first-generation packaging. The value <default> is what you’ll see unless you’re actually workng on 1GP.
The default package directory designated in sfdx-project.json is the one that should be used when retrieving metadata that is new to the local project to ensure it’s placed in the desired/correct location. Since you only have one package directory in that file, it should be the default package directory. IC also has its own notion of a default source root in Illuminated Cloud | Configure Module, but it’s only relevant if the project has multiple configured source roots. You can certainly see if it’s set to something other than force-app/main/package-a, though.
If you’d like, you can enable debug logging for Metadata Retrieval and Salesforce DX, reproduce the unexpected behavior, and share the resulting idea.log with me via email for review. I’d also need you to explain the expected result vs. the actual result so I can use that information to understand what I’m seeing in the log.
Regards,
Scott Wells